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yellow · warm

#bba637

a balanced, vivid yellow · warm · closest name: Dark Khaki

Token name suggestion: Atlas Honey

RGB
187, 166, 55
HSL
51°, 55%, 48%
CMYK
0, 11, 71, 27
Luminance
0.3811

#bba637 is a balanced vivid yellow, 51° on the wheel and 17/100 on the cool side. Put black text on it (8.62:1). As text it scores 2.44:1 on white — use #847527 instead. Nearest name is Dark Khaki, nearest Tailwind family is yellow.

hsl(51 55% 48%)rgb(187 166 55)Base step 600AAA inkWarm

At a glance

Every number on this page in one read: what #bba637 is made of, how bright it looks, and which way it leans.

Hex
#bba637
Hue
51°
yellow
Saturation
55%
vivid
Lightness
48%
balanced
Brightness
73%
HSV value
Perceived
64%
weighted brightness
Luminance
0.3811
WCAG relative
Temperature
Warm
17/100 cool
Color family
Yellow
Tone
Vivid
Best ink
Black
8.62:1
Closest name
Dark Khaki
ΔE2000 8.1
Chroma
57.6
LCH, 0–130ish
OKLCH L
0.724
perceptual lightness
Tailwind
yellow
500 · ΔE 10.8
Web-safe
#CC9933
nearest of 216
Where it sits
Hue51° of 360°
Saturation55%
Lightness48%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #bba637.

Temperature
Warm ← → Cool17% cool

Reads warm. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Luminance by channel
Red28%
Green72%
Blue1%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

Every format

HEX#bba637
HEX (8-digit)#bba637ff
RGBrgb(187, 166, 55)
RGBArgba(187, 166, 55, 1)
HSLhsl(51, 55%, 48%)
HSV / HSBhsv(50, 71%, 73%)
HWBhwb(51 22% 27%)
CMYKcmyk(0%, 11%, 71%, 27%)
LABlab(68.1 -4.8 57.5)
LCHlch(68.1 57.6 94.7)
OKLCHoklch(0.724 0.129 98.3)
XYZ (D65)xyz(34.82, 38.11, 9.14)
Decimal12297783
Display P3color(display-p3 0.733 0.651 0.216)
Web-safe#CC9933

Copy-ready code

every platformclick to select
/* CSS */
color: #bba637;
background-color: #bba637;
/* CSS custom property */
--brand: #bba637;
/* Tailwind (arbitrary) */
class="text-[#bba637] bg-[#bba637]"
/* SCSS */
$brand: #bba637;
/* SwiftUI */
Color(red: 0.733, green: 0.651, blue: 0.216)
/* UIKit */
UIColor(red: 0.733, green: 0.651, blue: 0.216, alpha: 1)
/* Android XML */
<color name="brand">#BBA637</color>
/* Android Compose */
Color(0xFFBBA637)
/* Flutter */
Color(0xFFBBA637)
/* Python / OpenCV (BGR) */
(55, 166, 187)
/* Python / PIL (RGB) */
(187, 166, 55)
/* Java AWT */
new Color(187, 166, 55)
/* .NET */
Color.FromArgb(255, 187, 166, 55)
/* OpenGL / Unity (0–1) */
(0.7333f, 0.6510f, 0.2157f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{187,166,55}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #bba637 85%, white);
border-color: color-mix(in oklab, #bba637 40%, transparent);
/* theme-aware in one line */
color: light-dark(#62571D, #EEEAD3);
/* relative colour syntax */
--hover: hsl(from #bba637 h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select
:root {
  --brand-50: #FBFAF4;
  --brand-100: #F6F4E9;
  --brand-200: #EEE9CE;
  --brand-300: #E5DCA8;
  --brand-400: #D9CA7D;
  --brand-500: #CCB952;
  --brand-600: #bba637;
  --brand-700: #9E8C2E;
  --brand-800: #7E7025;
  --brand-900: #5C521F;
  --brand-950: #393313;
  --brand: #bba637;
  --brand-ink: #000000;
  --brand-surface: #FAF9F4;
  --brand-border: #ECE5C0;
  --brand-hover: #A08E2F;
  --brand-pressed: #847527;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #242214;
    --brand-ink: #EEEAD3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#FBFAF4',
        100: '#F6F4E9',
        200: '#EEE9CE',
        300: '#E5DCA8',
        400: '#D9CA7D',
        500: '#CCB952',
        600: '#bba637',
        700: '#9E8C2E',
        800: '#7E7025',
        900: '#5C521F',
        950: '#393313',
        DEFAULT: '#bba637',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #FBFAF4,
  '100': #F6F4E9,
  '200': #EEE9CE,
  '300': #E5DCA8,
  '400': #D9CA7D,
  '500': #CCB952,
  '600': #bba637,
  '700': #9E8C2E,
  '800': #7E7025,
  '900': #5C521F,
  '950': #393313,
);
$brand-base: #bba637;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#FBFAF4", "$type": "color" },
      "100": { "$value": "#F6F4E9", "$type": "color" },
      "200": { "$value": "#EEE9CE", "$type": "color" },
      "300": { "$value": "#E5DCA8", "$type": "color" },
      "400": { "$value": "#D9CA7D", "$type": "color" },
      "500": { "$value": "#CCB952", "$type": "color" },
      "600": { "$value": "#bba637", "$type": "color" },
      "700": { "$value": "#9E8C2E", "$type": "color" },
      "800": { "$value": "#7E7025", "$type": "color" },
      "900": { "$value": "#5C521F", "$type": "color" },
      "950": { "$value": "#393313", "$type": "color" }
    },
    "brandInk": { "$value": "#000000", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#000000 on #bba637 · 8.62:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.44:1
AA fail · AA large fail · AAA fail
Aa
Black text · 8.62:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #bba637 as text scores 2.44:1 on white and 8.62:1 on black.
Best tinted ink on it, if plain black or white feels flat: #62571D at 2.97:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox
#847527 · 4.61:1
AA on white−14% L
#847527
The quick fox
#64591E · 7.02:1
AAA on white−22% L
#64591E
The quick fox
#bba637 · 8.62:1
AA on blackalready passes
#bba637
The quick fox
#bba637 · 8.62:1
AAA on blackalready passes
#bba637

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #A79531 is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

Aa
#bba637 on white: 2.44:1
AA ✗ fail · AA-large · AAA
Aa
#bba637 on black: 8.62:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #bba637 as text on that neutral, and that neutral as text on #bba637.

NeutralRatioBoth directions
White2.44:1AaAa
Slate 502.33:1AaAa
Slate 1002.22:1AaAa
Slate 2001.98:1AaAa
Slate 3001.64:1AaAa
Slate 4001.05:1AaAa
Slate 5001.95:1AaAa
Slate 6003.11:1AaAa
Slate 7004.25:1AaAa
Slate 8006.01:1AaAa
Slate 9007.33:1AaAa
Black8.62:1AaAa
Colour vision deficiency
true color
protanopia · #B6A227
deuteranopia · #BCA93E
tritanopia · #CA9A90

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #bba637 is pinned to step 600; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#FBFAF4
#F6F4E9
#EEE9CE
#E5DCA8
#D9CA7D
#CCB952
#bba637
#9E8C2E
#7E7025
#5C521F
#393313
Base = 600Lightest = 50 · #FBFAF4Darkest = 950 · #393313Text step on white = 800
Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950
oklch tokensclick to select
:root {
  --brand-50: oklch(0.97 0.032 98.3);
  --brand-100: oklch(0.94 0.052 98.3);
  --brand-200: oklch(0.88 0.078 98.3);
  --brand-300: oklch(0.80 0.101 98.3);
  --brand-400: oklch(0.72 0.119 98.3);
  --brand-500: oklch(0.64 0.129 98.3);
  --brand-600: oklch(0.56 0.129 98.3);
  --brand-700: oklch(0.48 0.122 98.3);
  --brand-800: oklch(0.40 0.109 98.3);
  --brand-900: oklch(0.32 0.091 98.3);
  --brand-950: oklch(0.24 0.071 98.3);
}

Colors that work with #bba637

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#000000
Black wins here
Surface#FAF9F4
Tinted page background
Border#ECE5C0
Hairlines and dividers
Muted text#9B8E4B
Captions on the surface
Accent#326CC0
Second voice, not a rival
Dark variant#62571D
Hover, pressed, headers
Light variant#F9F7EB
Selected rows, tints
Dark surface#242214
Dark-mode background
Hover#A08E2F
One step down in lightness
Pressed#847527
Two steps down
Disabled#C2BDA0
Chroma pulled out
Focus ring#D3BA34
Offset from the fill so it reads
Light mode
Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge
Dark mode
Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states
Save changesHoverPressedDisabled
OutlineSubtleLinkFocused
Form field
you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates
Notice
Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft
Data
Storage used68%
Acme LtdActive
NorthwindTrial
GlobexActive

How to use #bba637

Derived from its contrast, chroma and lightness — not from taste.

Works well for
  • Text and icons on dark surfaces
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Text of any size on white — fails WCAG AA
  • Full-page backgrounds — tiring over long sessions
  • Thin strokes and 1px borders — they disappear on light UI
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Not as text
Safe as a fill behind white type
No — use #62571D
Safe as a 1px border on white
No — use #A79531

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

optimisticalertcheap-and-cheerfulvisible

The most visible hue at low light levels, which is why it owns warnings, hazard tape and value retail.

This is a confident chroma: strong enough to lead a brand, restrained enough to live in an interface all day. The mid lightness keeps it versatile in both themes.

Worth knowing

Almost never passes contrast against white. Treat it as a surface or a marker, not as text.

Reads as
  • FormalityMedium
  • EnergyMedium-high
  • Weight53/100
  • TemperatureWarm
  • ApproachabilityHigh

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary#374CBB
Analogous left#BB6437
Analogous right#8EBB37
Split-complement 1#378EBB
Split-complement 2#6437BB
Triadic 1#37BBA6
Triadic 2#A637BB
Tetradic#37BB64
On the wheel
Base+30°−30°+120°+240°+180°51°

#bba637 sits at 51°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red73.3%
Green65.1%
Blue21.6%
R · 0–255
187
0xbb
G · 0–255
166
0xa6
B · 0–255
55
0x37

CMYK percentages

Cyan0.0%
Magenta11.2%
Yellow70.6%
Key (black)26.7%

Total ink coverage is 109%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#bba637 text on a black background

contrast 8.62:1

Card sample

#bba637 text on a white background

contrast 2.44:1

Card sample

#bba637 on grey

2.22:1

#bba637 on its own surface

2.31:1

#bba637 on its dark surface

6.56:1

CSS3 live lab

Text font color

The quick brown fox

color: #bba637;
Background color
Panel with #bba637 background
background-color: #bba637;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #bba637;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(187, 166, 55, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(187, 166, 55, 0.45);
Border & gradient
Gradient panel
border: 3px solid #bba637;
background: linear-gradient(135deg, #bba637, #78BB37);
Gradient text

Gradient headline

background: linear-gradient(90deg, #bba637, #57BB37);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #bba637;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #bba637;
caret-color: #bba637;
Left rule
Pull quote or callout
border-left: 4px solid #bba637;
Ring + tint
Selected chip
background: #F9F7EB;
box-shadow: inset 0 0 0 2px #bba637;
Conic badge
68%
background: conic-gradient(#bba637 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #bba637 over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select
rgba(187, 166, 55, 0.5)
rgb(187 166 55 / 50%)
#bba63780
hsl(51 55% 48% / 50%)
color-mix(in srgb, #bba637 50%, transparent)
Alpha8-digit hexFlat on white
10%#bba6371a#F8F6EB
20%#bba63733#F1EDD7
40%#bba63766#E4DBAF
60%#bba63799#D6CA87
80%#bba637cc#C9B85F

Gradients from #bba637

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation
Same hue, three lightnesses — safe anywhere
background: linear-gradient(135deg, #D0BE5F, #bba637 45%, #62571D);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #bba637, #5FA330);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #bba637, #374CBB);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #D7C877 0%, #bba637 45%, #62571D 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #FAF9F4, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #CE7658 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #92C948 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #62571D 0%, transparent 65%), #bba637;

Monochromatic scale

Palettes built from #bba637

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

#bba637 in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
RetailLeisureEnergyWarning systems
Common UI roles
ButtonsLinksFocus statesCharts
Print note

Converts to four-color process without much drama. Proof it anyway.

On screens

Holds up across typical panel gamma. Still worth checking on an uncalibrated laptop, where mid-tones shift most.

In dark mode

Usable as-is on a dark surface at 8.62:1.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

#bba637, answered

What color is #bba637?

#bba637 is a balanced vivid yellow, closest to Dark Khaki (ΔE2000 8.1). It sits at 51° on the hue wheel with 55% saturation and 48% lightness, which reads as warm.

What is the RGB value of #bba637?

rgb(187, 166, 55) — 187 red, 166 green and 55 blue out of 255, or 73.3% / 65.1% / 21.6% by channel.

What is #bba637 in HSL and HSV?

hsl(51, 55%, 48%) and hsv(50, 71%, 73%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #bba637 a light or a dark color?

It is a mid-tone. Relative luminance is 0.3811 and perceived brightness is 64%, so black text on it reaches 8.62:1.

Should I use black or white text on #bba637?

Black. It scores 8.62:1 against #bba637, versus 2.44:1 for white — AAA at any size.

Is #bba637 accessible on a white background?

#bba637 on white scores 2.44:1, which fails WCAG AA at every size. Darken it to #847527 to reach 4.5:1, or #64591E for 7:1.

What is the complementary color of #bba637?

#374CBB sits directly opposite on the wheel. Softer options are the split-complements #378EBB and #6437BB, which give the same contrast with far less vibration.

What colors go well with #bba637?

For interface work: #FAF9F4 as the surface, #ECE5C0 for borders, #9B8E4B for secondary text, #326CC0 as an accent and #62571D for hover and pressed states. For a palette, the analogous pair #BB6437 and #8EBB37 stays calm, while #374CBB is the loudest partner.

What is #bba637 in CMYK for printing?

cmyk(0%, 11%, 71%, 27%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #bba637 warm or cool?

Warm — it scores 17 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #BB8337; nudged cooler, #A1BE35.

Which Tailwind color is closest to #bba637?

The yellow family — its 500 step is #eab308, ΔE2000 10.8 away. That is a visible difference, so define #bba637 as a custom token rather than reaching for the built-in.

How do I use #bba637 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#bba637] or text-[#bba637], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #bba637 with 50% opacity?

rgba(187, 166, 55, 0.5), or #bba63780 in eight-digit hex. Over white that composites to #DDD39B; over black, #5E531C.

Is #bba637 a web-safe color?

No. The nearest web-safe colour is #CC9933, ΔE2000 9.4 away. The palette only matters for legacy displays and some email clients now.

What does the color #bba637 mean?

As a yellow, it reads optimistic, alert, cheap-and-cheerful. The most visible hue at low light levels, which is why it owns warnings, hazard tape and value retail. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #bba637?

The safest is same-hue elevation: linear-gradient(135deg, #D0BE5F, #bba637 45%, #62571D). For more colour, a short hue run to #5FA330 keeps it rich without turning muddy.

Work with #bba637 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #bba637 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.